How to Read the Index

The entries list the map name, the latitude and longitude of the southeast corner of the map, the date that particular edition of the map was last published, and the scale of the map in minutes.

Stillwater 36-97 1893 15'

Name of map: Stillwater
Latitude: 36 degrees north
Longitude: 97 degrees west
Date of map edition: 1893
Scale: 15 minutes = 1:62,500 (1 inch = approximately 1 mile)

Note: 30 minutes = 1:125,000

Occasionally, the map index may include a more detailed legal description for the maps including township, range, and section, as in the following example:

Ottawa County 36-94 1927
- T29N, R23E sec. 13-36

Name of map: Ottawa County
Latitude: 36 degrees north
Longitude: 94 degrees west
Date of map edition: 1927
Township: 29 north
Range: 23 east
Sections: 13-36